Checked hull lengths on once-fired Fiocchi 16X65 loads I bought in 1980s and they are 64,5 mm. Venezuelian and Rio 16X67 mm loads have 67 mm hulls. Loaded-in-England "12X65" bismuth loads really have 67 mm hulls. Have no once-fired hulls from other "16X65" or "12X65" ammo I have (Kent TM mostly). Unfortunately, have no remaining German or Canadian Imperial 16 gauge ammo hulls or boxes.
As stated in previous post, ALL my old Swedish hammer doubles have actual, measured chambers of 65 mm and German ones actual 67 mm chambers. While my decades-long experience has consistantly found these chamber lengths, my "handful" of guns is hardly a statistically valid sample.
Tobais,
I could not find your artikel about 65 & 67 mm chambers on search of Vapendepot.se. Perhaps it is sold out.
I do agree with you that British and American usage of 2 1/2 inch chamber or hull length sould not be taken as actual measurement -- this is point I have made for past few decades.
Raimey,
I could not get google-book you reference to display.
Regards,
Niklas
